GB/T 23774-2009 PDF English
US$130.00 · In stock · Download in 9 secondsGB/T 23774-2009: Inorganic chemicals for industrial use -- General method for the determination of whiteness Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 23774-2009 | English | 130 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Inorganic chemicals for industrial use -- General method for the determination of whiteness
| Valid |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 23774-2009
GB/T 23774-2009: Inorganic chemicals for industrial use -- General method for the determination of whiteness
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT23774-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.060.01
G 10
Inorganic chemicals for industrial use - General
method for the determination of whiteness
Issued on. MAY 23, 2009
Implemented on. JANUARY 01, 2010
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Instruments and apparatuses... 5
5 Test procedures... 6
6 Result calculation... 7
Foreword
This Standard was proposed by China Petroleum and Chemical Industry
Federation.
This Standard shall be under the jurisdiction of Subcommittee on Inorganic
Chemical Industry of National Standardization Technical Committee of
Chemical (SAC/TC 63/SC 1).
The main drafting organizations of this Standard. Guangxi Hezhou Kelong
Micro-powder Co., Ltd., CenerTech Tianjin Chemical Research and Design
Institute Co., Ltd., Jiande Tianshi Calcium Carbonate Co., Ltd.
The drafters of this Standard. Li Qihong, Zhang Xiaoyan, Wang Lulu, Zhou
Xinmin, Fu Liqiong.
This Standard is issued for the first time.
Inorganic chemicals for industrial use - General
method for the determination of whiteness
1 Scope
This Standard specifies the terms and definitions, instruments and apparatuses,
test procedures and result calculation of the general method for the
determination of whiteness of inorganic chemicals for industrial use by the
whiteness meter.
This Standard applies to the determination of whiteness of powder products in
inorganic chemicals for industrial use.
2 Normative references
The terms in the following documents become the terms of this Standard by
reference to this Standard. For dated references, all subsequent amendments
(not including errata content) or revisions do not apply to this standard. However,
parties to agreements that are based on this Standard are encouraged to study
whether the latest versions of these documents can be used. For undated
references, the latest edition applies to this Standard.
GB/T 3979, Methods for the measurement of object color
GB/T 9086, The white standard plate for colorimetry and photometry
GB/T 5950, Method for measurement of whiteness of building materials and
non-metal mineral products
3 Terms and definitions
The following terms and definitions are applicable to this Standard.
3.1 Whiteness
It refers to the ratio of the amount of diffusely reflected radiant energy on the
surface of the measured object in the visible light region to that of a completely
white (standard white) object, which is expressed in percentages. It is the
degree of whiteness, called whiteness.
4 Instruments and apparatuses
4.1 Whiteness meter
4.1.1 The whiteness meter that is used in this Standard is illuminated by D65 or
A light source; the illumination and observation condition can be any one of
vertical/diffusion (0/d) and diffusion/vertical (d/0).
4.2 Standard white plate
Ceramic standard white plate and powder standard white plate (magnesium
oxide and barium sulfate) shall meet the requirements of GB/T 9086.
4.3 Working standard white plate
For the convenience of measurement, a white ceramic plate with a smooth
surface, no stains, no cracks, and no scratches that affect its performance can
be used as a working standard white plate for daily calibration of instrument
values. The working standard white plate shall meet the requirements of GB/T
3979 Methods for the measurement of object color.
4.4 Constant pressure powder compactor
The constant pressure powder compactor and compaction box are shown in
Figure 1.
5 Test procedures
5.1 Sample preparation. fully mix the taken samples; use the quarter method to
reduce the average sample whose total amount is not less than 500 g;
according to the sample pressing steps, press a sample surface of flat surface
without roughness for instrument measurement.
5.2 Steps for pressing the sample
5.3 Perform the instrument adjustment in accordance with the requirements of
the instrument manual; measure the sample.
5.4 Under the same test conditions, the difference between the three
consecutive measurement results is not more than 0.3, or the difference
between the two measurement results before and after rotating the sample
angle is not more than 0.6.The average value of the measurement results that
meet the above requirements is the whiteness value of the sample.
5.5 If an indentation is found after the same sample is measured, the measured
data shall invalid and another measurement shall be taken.
6 Result calculation
6.1 The blue reflection whiteness is calculated by wr, according to Formula (1).
Where.
6.2 Ganz whiteness is calculated by wg, according to Formula (2).
6.3 The whiteness of building materials is calculated by wj, according to
Formula (3).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 23774-2009 be delivered?Answer: The full copy PDF of English version of GB/T 23774-2009 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 23774-2009_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 23774-2009_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 23774-2009 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. How to buy and download a true PDF of English version of GB/T 23774-2009?A step-by-step guide to download PDF of GB/T 23774-2009_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 23774-2009".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|